函数y=x^3在x=-1处,△x=0.02时增量△y=(),微分dy=()
举一反三
- 设函数y=f(x)具有二阶导数,且f’(x)>0,f"(x)>0,Δx为自变量x在x0处的增量,Δy与dy分别为f(x)在点x0处对应的增量与微分,若Δx>0,则______ A: 0<dy<Δy. B: 0<Δy<dy. C: Δy<dy<0. D: dy<Δy<0.
- 已知函数y=x²-1÷x其微分dy=?
- 设y=x^(x)(x>0)则函数y的微分dy=?
- 求函数y=1/x+2√x的微分dy
- 函数\(z = {x^y}\)的全微分为 A: \(dz = y{x^{y - 1}}dy + {x^y}\ln xdx\) B: \(dz = y{x^{y - 1}}dx + {x^y}dy\) C: \(dz = y{x^{y - 1}}dx + {x^y}\ln xdy\) D: \(dz = y{x^{y - 1}}dy + {x^y}dx\)